Roller-bearing for turn-tables.



H. H. HARRIS. ROLLER BEARING FOR-TURN TABLES.

'APPLICATION FILED 31111.31, 1911.

.Patented Nov. l2, 1912.

I 'gi-55.112

'NITE STATES PATENT FFICE.

HOLLIS H. HARRIS, OF LORAIN, OHIO, ASSIGNOR T0 THE THEW AUTOMATIC SHOVEL COMPANY, 0F LORAIN, OHIO, A CORPORATION OF OHIO.

ROLLER-BEARING FOR TURN-TABLES. I

Specification of Application filed January 31, 1911.'

provided with a central opening b2, and with its webs arranged to make several pockets o opening downwardly and positioned on chords about .such center. In these pockets are carried supporting wheels C, `which cooperate with the track a.

vThere are four wheels C shown iu die drawings in the four pockets o, respectively.

Letters Patent. Patented Nov. `12, 1912.

Serial N o. 605,814.

To ad whom it may concern:

Be it known that I, HoLLrs H. HARRIS, a citizen of the United States, residing at Lorain, in the county of Lorain and State of Ohio, have invented-a certain new and useful' Improvement in Roller-Bearings for Turn-Tables, o 'which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to turn tables of the type adapted to support comparatively heavy mecha'nism and swing about a vertical center. As an illustrationof such use may be cited a steam shovel or similar machine, wherein the digging and hoistin mechanism is mounted on a platform swiveled on a truck. v

My invention is concerned particularly with the arrangement of the turn-table wheels and their support and the circular o1' curved track on which the wheels travel.

The objects of the invention are to provide such cooperating parts vin a forni which shall be very efiicient, readily adjustable for wear, and, furthermore, in which a broken wheel may be replaced with as little inconvenience and loss ot' time as possible.

My invention comprises the means I have employed to this end, as more fully hereinafter explained and set out in the claims.

In the drawings, Figure l is a bottom plan and having a beveled periphery correspml ing to the bevel of the track a.. Each wheel C is journaled on a stationary pin D which is carried by the walls of the pocket ZP. These walls, as shown, consist of the webs 'b4 and b5 and the bosses o and If carried thereby. In the interest of compactness the under faces of the bosses o are cut away so that the journal pins I) may stand close above the top ot the gear a.

The wheel C is shown as provided with a suit-able bushing E of bronze, or other material, surrounding the journal pin and having a flanged end e on the outer side of the wheel. Abutting this flanged end is a collar surrounding the journal pin and composed of two members F and F, bolted together by bolts f. The member Fof this collar carries a feather f engaging aV longitudinal groove in the journal pin, while the other member F has a pair of wings f2 straddiing a radial fin o in the inner face of the wall of my turn-table, illust-rating, in broken Zr". Each of the two members of the collar llnes, the curved trackway wlnch stands behave inwardly projecting semicircular neath it; Fig. 2 1s an end view of the turnflanges f3 and f4 occupying ail annular table; Fig. 3 is a vertical section through the journal of one of the wheels; Fig. t is a transverse section on the line t--Ll of Fig. 3 looking toward the right butl showing in broken lines the wheel at the left of the section plane.

Referring to the parts shown by reference letters, A. represents the track, which is shown as curved about a center and has a beveled tread port-ion a. The trackway is shown also as made with an integral upright stationary external gear a', which is provided for engagement by a` pinion, not shown, ou a suitable superstructure mounted on the turn-table.

l represents the frame of the turn-table proper, which is shown as consisting ot a pair of parallel I-bcanis L and a suitable intermediate casting secured thereto, and having a top plate b and various depending stili'ening webs. This casting is shown as groove d in the Journal pin I). Accordingly, the collar, when in place, is held to the journal pin, against iinlcpendcnt movement, either longitudinally or rotatably.

Screwing into the outer portion of the bore ot' the boss 7)? is a plug G which carries a set screw Il bearing against the outer end of the'journal pin D. The plug G is provided with an angular exterior head g by which it may be turned into place or removed. This set screw has a usual angular head byvwhich it may be turned and vided with a jam nut J for locking it.

lVith the parts as described the collar F, F holds the journal pin against rotation so that the wheel (with the bronze bushing) turns on it as the table is turned. The outward thrust on the wheel C, due to the beveled engagement' o1u its periphery and the track, is taken by the ange c of the bushleach wheel being mounted on a radial mi! is proing against the collar and Vtransmitted -saving the time of the various men employed through the -eollar to the journal pin and thence to the set screw II. To adjust any wheel so that it carries its proper propor-` it is only necessary to take out the bolts f, whereby the half collar I4" drops away from the journal pin and the halt colla-r F may be lifted to free its arcual rib f3 from the groove Z (there being suiii cient space between the top of this half collar and the bottom of the tin bs to allow this) ,and the journal pin, thus freed, is then shoved radially inward through the open inner -end of the boss b whereupon the wheel drops downwardly through the open space between the outer edge o the track aand the bottom' of the wall b5. This radial shoving of the journal in may be facilitated by taking out the plug G and usin a suitable implement against either end o the journal pin. It will be seen that the removal of a broken wheel and the corresponding replacement of anew wheel may without disturbing the turn-table or its superstructure. This avoids the necessity for jacking up the turn-table, as has been heretofore customary. The replacement of a broken wheel may be accomplished with great rapidity, no other tool being necessary than the usual monkey wrench. This rapidity of rreplacement is of great value'in -either in operating the machine or in duties dependent on the operation oi the machine.

Having thus described my invention, what I claim is z- 1. In a turn-tablehthe combination, with a turn-table frame and trackway, of wheels, journal pins for said wheels mountedin the frame, and separable collars on the journal pins, said collars locking the pins against longitudinal mover ent, whereby the removal of the collar ah. ws such movement of the pin to release the wheel.

' '2. Ina turn-table, the combination,

with a I frame, of a journal pin carried thereby, a

wheel on the journal pin, a split collar on the journal pin forming an abutment for vthe wheel, and a holding member carried by said frame with which such collar engages to prevent its rotation.

`3. In a turn-table, frame, a journal pin, lar composed o'l separable portions the combination ot a a .wheel thereon, a colperipherally embracing the journal pin, a shoulder on the collar cooperating with astop on the trame, and bolts for holding the collar portions together'.

the frame, coacting shoulders e accomplished' tif/1 1,043,826

fl. In a mechanism of the character described, the combination of a wheel, a journal pin therefor, a collar on the journal pin made of two parts, bolts for holding such parts together, such collar being provided with an inward flange engaging a circumfer ential groove in the pin, and a shoulder on the collar engaging a stop on the frame.

5. In a mechanism of the character described, the combination, with a frame having two bearings, of a journal pin carried thereby, a bevel wheel slidably mounted on the journal pin, a separable collar on the jo'urnal pin on the outer side of the wheel and between it and one ot the bearings on on the collar and journal pin for conveying the thrust of the wheel against the collar to the journal pin, and adjustable means for vreceiving the thrust on the journalv pin.

6. In a mechanism of scribed, the combination of a beveled wheel,

the character dea journal pin carrying the same, a two-part collar surrounding the journal pin and provided with an inward tlange engaging a circumferential groove in the pin, said collar also having an outward shoulder, a stop engaging said shoulder, and an adjustable abutment bearing against the end of the journal pin.`

7 In a mechanism of the character described, the combination, with a frame, of a journal pin carried thereby, a beveled wheel rotatably and slidably mounted on the journal pin, a split collar on the journal pin on the outer side oi the` wheel, there being means for preventing the collar rotating and means for preventing the journal pin rotating and means for conveying the thrust othe wheel against the collar to the journal pin, a plug screwing into a bore at the end of the journal pin,'and a set screw carried by said plug and bearing against the end of the journal pin.

8. In a turn-table, the combination, with a frame, oi' a pair of bearings carried thereby, a journal pin in said bearings, a plug screwing into one of the bearings at the end of the journal pin, a set screw screwing through the plug and bearing against the end of the journal pin, a separable, collar surrounding the journal pin, projections and grooves on the collar and journal pin preventing independent rotation and longitudinal shifting of them, means on the frame engaging the collar to prevent rotation while allowing longitudinal shifting, and a beveled wheel rotatably mounted on the journal pin and taking its thrust against the collar. l

9. In a turn table, the combination, with a track,.of a irame or the turn table proper having a pair of bearings, a journal pin mounted in said bearings, a' wheel slidably mounted on the journal pin, a separable collar surrounding the journ l pin at one side 1,:

the Wheel to hold it in place, and having a shouldered engagement With the ournal pin to carry the thrust on the Wheel to the jour 5 nal pin, and In thrust of the pin.

eans

l0. The combination, Witha traekhaving a'beveled face, Wardly facing lO pockets,

journal pins carried by beveled` Wheels on the journalv pins engaging the trackway,

a turntable having downf" radially mounted pockets,

the Walls of said separable collars on the journal` pinsv onxthe outer sides of the Wheels, 15

the upper'meinber of Such collar being provided with a shoulder engaging la stop carried by theturn table framej andthe lower member carrying a feather longitudinal groove. in the l1. The combination,

20 a beveled face,

j engaging a journal pin. with a track having a turn-table having downengaging the trackway,

for receiving the endv 'the journal pins on the outer Sides of the Wardly facing pockets, radially mounted journal pins carried by the Walls of said pockets, beveled Wheels on the journal ins separable collars on ing through said plug and bearing against the end of the journal pin.

In testimony whereof, I hereunto ailix my signature in the presence of two Witnesses.

HOLLIS H. HARRIS.

Witnesses.: ALBEnrH. BATES, BREMAN B. WEST. 

